Digital Commons Network^™

The Effects And Mechanisms Of Phytochemicals On Alzheimer’S Disease Neuropathology, David Ross

Loma Linda University Electronic Theses, Dissertations & Projects

Alzheimer’s disease effects millions of people, yet pharmacological treatments are limited. In the absence of effective treatments, identifying factors that can decrease the risk of developing Alzheimer’s disease is of significant interest. A growing body of epidemiological and experimental evidence suggests that dietary fruits and vegetables can have neuroprotective effects against the harmful effects of oxidative stress, neuroinflammation, and aging. These effects are mediated by various phytochemicals, which are compounds found in plants that can possess antioxidant, anti-inflammatory, and other beneficial properties. This review addresses epidemiological and experimental evidence for the effects and potential mechanisms of several commonly consumed phytochemicals …

Use Of Live And Robotic Assistance Animals For Psychological And Cognitive Health In Military Populations, Rachelle M. Cross

Dissertations

This literature review addresses the use of live and robotic animal-assisted therapy for psychological and cognitive health in military populations. More specifically, this literature review aims to address the benefits and limitations of the use of live animal-assisted therapy, complementary and alternative techniques (i.e., Combat and Emotional Stress Control Dogs and social robots) for military personnel, and possible attitudinal barriers regarding active duty and veteran soldiers, while utilizing literature conducted with the civilian population to augment. A systematic review of peer-reviewed quantitative and qualitative publications and book chapters was utilized to accomplish this. Results of the literature review indicated that …

Estimating The Associations Between Big Five Personality Traits, Testosterone, And Cortisol, Zachary Sundin, Lester Sim

Research Collection School of Social Sciences

Objective: Hormones are often conceptualized as biological markers of individual differences and have been associated with a variety of behavioral indicators and characteristics, such as mating behavior or acquiring and maintaining dominance. However, before researchers create strong theoretical models for how hormones modulate individual and social behavior, information on how hormones are associated with dominant models of personality is needed. Although there have been some studies attempting to quantify the associations between personality traits, testosterone, and cortisol, there are many inconsistencies across these studies. Methods: In this registered report, we examined associations between testosterone, cortisol, and Big Five personality traits. …

A Two-Step Polynomial And Nonlinear Growth Approach For Modeling Covid-19 Cases In Mexico, Rafael Perez Abreu C., Samantha Estrada, Hector De-La-Torre-Gutierrez

Psychology Faculty Publications and Presentations

Since December 2019, the novel coronavirus (SARS-CoV-2) and its associated illness COVID-19 have rapidly spread worldwide. The Mexican government has implemented public safety measures to minimize the spread of the virus. In this paper, we used statistical models in two stages to estimate the total number of coronavirus (COVID-19) cases per day at the state and national levels in Mexico. In this paper, we propose two types of models. First, a polynomial model of the growth for the first part of the outbreak until the inflection point of the pandemic curve and then a second nonlinear growth model used to …

Desire, Culture, And The Body, Zoey Lavallee

Dissertations, Theses, and Capstone Projects

What is the nature of desire? In this dissertation I develop a theory of desire according to which desires are essentially enculturated states that play the role of presenting favorable outcomes that act as inputs to intention formation, and thereby intentional action. This analysis of desire debunks a common assumption shared by prominent accounts of desire in philosophy of mind, what can be called the dualist assumption: that bodily desires such as urges and appetites differ in kind from conceptual desires that are typically described as higher cognitive attitudes. I argue that the desires traditionally understood as bodily or appetitive …

Common Executive Function Predicts Reappraisal Ability But Not Frequency, Wei Xing Toh, Hwajin Yang

Research Collection School of Social Sciences

Cognitive reappraisal is an emotion-regulation strategy that positively impacts various facets of adaptive functioning (e.g., interpersonal relations, subjective well-being). Although reappraisal implicates cognitive processing, no clear consensus has been reached regarding its cognitive correlates. Therefore, we examined how executive function (EF)-i. e., a group of general-purpose control abilities comprising working memory, inhibition, and shifting-would be associated with task-based reappraisal ability and self-reported reappraisal frequency. Using a latent-variable approach, we found that the shared variance among EF facets (i.e., common EF)-a general goal-management ability that facilitates the activation and maintenance of task-relevant goals-was positively related to reappraisal ability but not reappraisal …

Women's Age Of First Exposure To Internet Pornography Predicts Sexual Victimization, Sarah J. Harsey, Laura K. Noll, Melissa J. Miller, Ryan A. Shallcross

Dignity: A Journal of Analysis of Exploitation and Violence

Increases in the availability and accessibility of Internet pornography have led growing numbers of children to become consumers of sexually explicit media. Research has identified negative behavioral and attitudinal outcomes associated with Internet pornography use in childhood and adolescence, but few studies have examined sexual victimization as a correlate. The current study aimed to examine the association between age of first Internet pornography exposure and sexual victimization. Data from 154 undergraduate women yielded several important findings. Women who viewed Internet pornography unintentionally at a younger age reported more sexual victimization. Specifically, compared to women who were first unintentionally exposed to …

“My Daughter Was Sacrificed By My Mother”: Women’S Involvement In Ritually Motivated Violence And Murder In Contemporary Africa, Chima Agazue

Dignity: A Journal of Analysis of Exploitation and Violence

Ritually motivated crimes are grave crimes that continue to plague contemporary Africa. Occasionally, victims abducted for ritual purposes are discovered and set free. Fresh or decomposing bodies are spotted somewhere, often with missing parts taken by the ritual killers who killed the victims. Some missing persons in the continent are presumed to have been abducted or killed by ritually motivated criminals. Although ritually motivated crimes take different forms, most of them involve brutal acts of violence and murder. The barbaric manner in which these criminals attack or slaughter their victims creates fear and panic. Traditionally, men commit serious crimes involving …

Impact Of Human Presence And Visual Access On Barking Behavior In Shelter Dogs, Emily W. Dowling, Jessie A. Catchpole, Christina M. Walthers, Madison J. Pattillo

Symposium of Student Scholars

Shelters can be stressful for dogs due to lack of predictability and control, social isolation, and busy environments. Providing dogs with more social opportunities and environmental predictability may improve their welfare. Barking may indicate stress and contribute to noise levels that are harmful to dogs and people. We investigated the impact of human presence and line of sight on barking. We manipulated line of sight by partially removing a crate barrier to allow the dogs visual access to other dogs and a better view of the room. We collected data on barking on 17 focal dogs as well as overall …

The Effects Of Olfactory Enrichment On Shelter Dog Behavior, Madison J. Pattillo, Lauren N. Mitchell, Jessica A. Catchpole, Allison L. Martin

The Kennesaw Journal of Undergraduate Research

Shelter environments are stressful for dogs due to loud noises and unfamiliar surroundings. Previous research showed that exposure to some scents resulted in reductions in activity and vocalizations in shelter dogs. We investigated the effects of two calming (lavender and vetiver) and two stimulating (lemon and rosemary) essential oils on crate position and active, resting, and stress behaviors. There were 8, 5-min observations conducted each week per dog, split between baseline and scent exposure. Our analysis using the Wilcoxon Signed-Rank test found that dogs exposed to lavender (n = 13), lemon (n = 10), rosemary (n = …

Librarian Behaviors, Students’ Personality And Academic Performance: A Case Of Public Libraries, Shahbaz Sharif Mr., Khurshed Iqbal Dr., Muhammad Asif Munir Mr., Kashif Saeed Dr., Sadaqat Ali Dr.

Library Philosophy and Practice (e-journal)

While technology has enabled academic libraries to go digital, it requires a librarian with great knowledge and real-world experience to perform the job well. To address this issue, a librarian equipped with skills for digitization and digitalization is key. Academic libraries have always used digitalization to encourage librarian behaviors. This research examines the effects of negative/positive librarian behavior patterns on student personality and academic performance immediately. The project is an endeavor to better understand how teachers' actions impact their students' performance and personality. The present study acknowledges the library education dynamics and the way that student performance and personality are …

The Bidirectional Effects Of Serious Conduct Problems, Anxiety, And Trauma Exposure: Implications For Our Understanding Of The Development Of Callous-Unemotional Traits, Emily Lynne Robertson

LSU Doctoral Dissertations

The association of anxiety and trauma with childhood conduct problems has long been the focus of research, and more recently this area of research has become critical to understanding the development of callous-unemotional (CU) traits. Research in samples of children and adolescents has indicated that those elevated on both CU traits and anxiety seem to show more severe externalizing behaviors and are more likely to show histories of trauma. These findings have typically been interpreted as being indicative of a unique casual pathway to CU traits in those high on anxiety. However, an alternative explanation is that the higher rates …

Social Mindfulness And Prosociality Vary Across The Globe, Niels Van Doesum, Ryan Murphy, Marcello Gallucci, Adam W. Stivers

Psychology Faculty Scholarship

Humans are social animals, but not everyone will be mindful of others to the same extent. Individual differences have been found, but would social mindfulness also be shaped by one’s location in the world? Expecting cross-national differences to exist, we examined if and how social mindfulness differs across countries. At little to no material cost, social mindfulness typically entails small acts of attention or kindness. Even though fairly common, such low-cost cooperation has received little empirical attention. Measuring social mindfulness across 31 samples from industrialized countries and regions (n = 8,354), we found considerable variation. Among selected country-level variables, …

Collective Awe: The Effects Of Shared Experience, Martha Szekely

College of Science and Health Theses and Dissertations

Awe, as a complex positive emotion that mixes wonder, veneration, and/or dread, has been shown to induce a small sense of self. In the current research, we focused on the question of whether sharing an awe experience has an impact on that experience. We conducted two studies in which we explored the effects of “collective awe” as it relates to awe intensity, awe-related emotions, self-diminishment, and wellbeing. In addition, based on previous research, we hypothesized that participants with higher awe intensity ratings and awe-related emotion scores would score higher on self-diminishment and wellbeing measures than participants with lower awe intensity …

The Dark Side Of Variety: An Economic Model Of Choice Overload, Teeger Li Blasheck, Jawwad Noor

The Yale Undergraduate Research Journal

Choice Overload is a phenomenon well studied in psychology. It goes against the classical ³more is better´ dogma and describes the behavior of an agent when presented with too many options, in which instance an agent may either experience a decrease in satisfaction or end up deferring the choice all together. The standard Utility Maximization model of economics, however, largely follows the classical dogma and is unable to accommodate the behaviors of Choice Overload. This paper seeks to offer two possible economic models for Choice Overload based on the two mechanisms put forward by the psychological literature: search cost and …

Book Review: Mythic Imagination Today: The Interpenetration Of Mythology And Science, Alexandra Sedgwick

Journal of Conscious Evolution

No abstract provided.

Positron Emission Tomography From 1930 To 1990: The Epistemology And Process Of Scientific Instrumentation, Rick Shang

Arts & Sciences Graduate Student Theses and Dissertations

Positron Emission Tomography (PET) is a groundbreaking detection system that, among many other applications, enabled neuroscience researchers to detect and image physiological changes in the brain associated with cognitive operations as subjects perform a task. This technology helped researchers learn to explore the physiological basis of human cognition in new ways and was the immediate forerunner of functional Magnetic Resonance Imaging (fMRI), a technology that continues to dominate the neurosciences. PET was also the founding invention of a new field of cognitive science: human functional neuroimaging. Indeed, some would say that PET encouraged a particular way of understanding the brain …

Positron Emission Tomography From 1930 To 1990: The Epistemology And Process Of Scientific Instrumentation, Rick Shang

Arts & Sciences Graduate Student Theses and Dissertations

Positron Emission Tomography (PET) is a groundbreaking detection system that, among many other applications, enabled neuroscience researchers to detect and image physiological changes in the brain associated with cognitive operations as subjects perform a task. This technology helped researchers learn to explore the physiological basis of human cognition in new ways and was the immediate forerunner of functional Magnetic Resonance Imaging (fMRI), a technology that continues to dominate the neurosciences. PET was also the founding invention of a new field of cognitive science: human functional neuroimaging. Indeed, some would say that PET encouraged a particular way of understanding the brain …

Personality Pathology And Cognitive Aging: The Role Of Interpersonal Stress, Patrick Joseph Cruitt

Arts & Sciences Graduate Student Theses and Dissertations

Research on the relationship between normal-range personality and cognitive aging has demonstrated consistent, but modest, effects. The current investigation seeks to increase our understanding of unhealthy cognitive aging by examining the maladaptive extremes of personality. Borderline and avoidant personality disorder (PD), but not obsessive-compulsive PD, were hypothesized to show prospective associations with cognitive aging. Interpersonal stress was expected to mediate these relationships. The current investigation tested these hypotheses in two longitudinal studies of older adulthood: the Alzheimer’s Disease Research Center cohort (ADRC, N = 434, Mage = 69.95, 56% women) and the St. Louis Personality and Aging Network study (SPAN, …

Which Task To Choose? The Impact Of Associative Retrieval Of Event Files On Voluntary Task-Switching Performance In Younger And Older Adults, Emily Carole Streeper

Arts & Sciences Graduate Student Theses and Dissertations

Previous task-switching research has demonstrated how prior experience can impact subsequent task-switching performance (i.e., reaction times, task choice) through associative retrieval, the creation and retrieval of event files. Event files, episodic traces which contain information about the stimulus, prior context, and action performed, can be implicitly retrieved when re-encountering information from the prior experience (e.g., stimulus repetition). The effect of associative retrieval on task-switching performance has been examined in younger adults, but few studies have investigated this effect in older adults. This gap is especially glaring in the voluntary task-switching literature where only one study to date has explored how …

The Disunity Of Perception, Benjamin Austin Henke

Arts & Sciences Graduate Student Theses and Dissertations

This dissertation argues for disunity in perceptual processing: rather than outputting to a single ‘centralized’ cognitive system, separate perceptual processing pathways produce different person-level representations for different purposes. I argue that this disunity has important implications for abstract theorizing in the philosophy and cognitive science of perception, for experimental methodology, and for our understanding of the normative role of perception itself. The first three chapters explore models in cognitive neuroscience which support perceptual disunity. In Chapter 1, I argue that a version of Milner and Goodale’s (2006) influential ‘two visual streams hypothesis’ survives its recent empirical challenges. In Chapter 2, …

Supporting Children With Neurodevelopmental Disorders: Routines And Environmental Factors Affecting Sleep Quality, Constance Lew, Susan Macdermott, Karen Park, Becki Cohill

Summer 2021 Virtual OTD Capstone Symposium

Background: Sleep difficulties are more common among children with neurodevelopmental disorders (NDDs). There is limited research on sleep strategies used by parents of children with NDDs or resources written by occupational therapists. The study examines current sleep concerns and strategies used by parents of children with NDDs, including those affecting time it takes to fall asleep, duration of sleep, routines, and environmental factors that influence sleep.

Method: Parents and caregivers of children with NDDs (n=22) and with no diagnosis (n=6) participated in a survey and optional interview to assess current concerns and strategies used to address sleep. Data gathered included …

Agency Rescues Competition For Credit Assignment Among Predictive Cues From Adverse Learning Conditions, Mihwa Kang, Ingrid Reverte, Stephen Volz, Keith Kaufman, Salvatore Fevola, Anna Matarazzo, Fahd H. Alhazmi, Inmaculada Marquez, Mihaela D. Iordanova, Guillem R. Esber

Publications and Research

A fundamental assumption of learning theories is that the credit assigned to predictive cues is not simply determined by their probability of reinforcement, but by their ability to compete with other cues present during learning. This assumption has guided behavioral and neural science research for decades, and tremendous empirical and theoretical advances have been made identifying the mechanisms of cue competition. However, when learning conditions are not optimal (e.g., when training is massed), cue competition is attenuated. This failure of the learning system exposes the individual’s vulnerability to form spurious associations in the real world. Here, we uncover that cue …

A Phenomenology Of Challenging Psychedelic Experiences: From Relational Trauma To Relational Healing, Leland Guthrie

Electronic Theses and Dissertations

Psychedelic medicine is a re-emerging therapeutic paradigm with potentially significant clinical applications. This study contributes to an understanding of the aspects of challenging psychedelic experiences that may contribute to therapeutic outcomes. Interview and written data from five participants about their challenging Ayahuasca experiences was analyzed using Interpretative Phenomenological Analysis (IPA). The results of this analysis revealed a phenomenological structure of challenging psychedelic experiences consisting of a change process that moved the participants from a sense of disconnection to a sense of connection with themselves, others, nature and the cosmos. Findings from the study suggest that challenging psychedelic experiences may be …

Interdependence With Our Most Forgetful Elders: Alzheimer's In The Anthropocene, Christine Heller

Electronic Theses and Dissertations

This dissertation uses autoethnography and critical psychological and philosophical theories to explore what people with Alzheimer’s disease teach us about being, forgetting, and dying in the Anthropocene. The author collected personal memory data from her lived experience of being with her mother while she had Alzheimer’s disease, and organized these memories into a series of vignettes. Each vignette was analyzed with critical psychological and philosophical theories to illuminate intersubjective themes of denial, things, ancestors, place, dying, and time. These themes connected the personal to the epochal and articulated the wisdom that our most forgetful elders can share in the Anthropocene, …

Borderline Personality Disorder: A Review And Analysis Through The Lens Of The Unified Theory, Paulihna S. Cechak

Dissertations, 2020-current

Abstract

In the field of psychology, there are many different ways to understand or make sense of a phenomenon. Researchers, theorists, or practitioners can approach topics via many different paradigms or schools of thought that guide their general understanding, programs of research or approach to therapeutic practice. Although this diversity of analysis affords some strength in terms of allowing many perspectives, it also brings with it a serious problem of fragmentation. With the countless theories and paradigms, we lack a shared language and meta-theoretical framework that assimilates and integrates the various bodies of knowledge and perspectives into a coherent frame …

Multivariate Cluster Analysis Of The Teacher Stress Inventory (Tsi) Prior To And During Covid-19, Berenice Saez

Electronic Theses and Dissertations

The coronavirus disease 2019 (COVID-19) pandemic has caused a negative situation with no precedents in the education system of the United States (U.S.). To mitigate the spread of the virus, many school closures occurred nationwide, and schools transitioned from face-to-face instruction to a mixture of self-directed guide home education or online teaching. These drastic changes could be causing teachers, as many other professionals exposed to sudden adjustments (e.g., medical doctors/firefighters), to express high levels of stress, emotional burden, and anxiety. The purpose of this study is to compare the profiles of the teacher stress inventory (TSI) before and during COVID-19. …

From Humble Brags To Insincere Flattery: An Examination Of Social Media Impression Management, Julia Hylton Whitaker

Psychology Dissertations - Archive

The purpose of this research was to develop and validate a self-report measure of social media impression management (SMIM), which could be used to examine the prevalence rates of these behaviors among job seekers, as well as to investigate behavioral differences in SMIM across Facebook and LinkedIn. Through examining a series of exploratory and confirmatory factor analyses (Study One, N = 548), a 38-item SMIM scale was produced (as well as a 20-item abbreviated scale) that is comprised of five-factors (i.e., honest self-promotion, deceptive self-promotion, honest ingratiation, deceptive ingratiation, defensive image protection). Through construct validation efforts, several dispositional attributes (e.g., …

The Effects Of Ketamine Administration On Novel Object Placement And Hippocampal Ampa Receptor Expression In The Male Long Evan Rats, Ruchael Mcnair

Theses, Dissertations and Culminating Projects

Many psychiatric and neurological disorders such as major depressive disorder (MDD) and mild cognitive impairment (MCI) present with deficits across many cognitive domains including spatial memory and structural dysfunction of the hippocampus. The dorsal hippocampus is indicated to play a special role in spatial memory. Synaptic plasticity mechanisms are also critical in memory function in the hippocampus. Long-term potentiation (LTP) is one type of synaptic plasticity that is directly associated with memory function. Mechanisms of LTP increase α-amino-3-hydroxy-5-methyl-4- isoxazolepropionic acid (AMPA) receptors through n-methyl-d-aspartate (NMDA) receptor activation. Ketamine is an NMDA antagonist that has recently gained attention for its rapid …

Intergenerational Risk Of Maternal Childhood Maltreatment On Infant Health Concerns In Low-Income Mexican American Mother-Child Dyads, Amanda Flagg

Legacy Theses & Dissertations (2009 - 2024)

Childhood maltreatment confers greater risk for psychopathology, health problems, and early mortality in adulthood. Emerging literature suggests that maternal childhood maltreatment exposure may have intergenerational consequences for infant health by interfering with mothers’ abilities to engage in sensitive and responsive caregiving. Although no studies to date have investigated contributions of maternal sensitivity to infant health, parallel bodies of research have shown that sensitive responding is an important predictor of infant physiological regulation, which is also related to immune functioning. The current study examined the associations between maternal childhood maltreatment, infant health concerns, and maternal sensitivity in a low income, Mexican …